Buffing device.



M. H. BALLARD. BUFFING DEVICE. APPLICATION FILED AUG. 19, 1904. RENEWED OUT. 14, 1907.

927,926, Patented July 13, 1909.

WITNESSES- j Um EDsT TEs PAT N OFFICE.

MILTON H. BALLARD, or LYNN, nAssAoHosET'rs, ASSIGNOR T0 UNITED sHoE MACHINERY oOMPaNYQoF ra'r RsoN, NEW JERSEY, A ooaroinriion orNEw JERSEY.

Bur-Fine DEVICE.

No. 927,926. a

Specification of Letters Patent. 1 Patented July 13,1909. Application messa es; 19,. 1994, s en 210.. 221,39 nenewedoctobet 1907. Serial Nasomsa To all whom it may concern: a a

Be it known that I, MILTON H. BALLARD, a citizen of the United States, residing at Lynn, in the county of Essex and Commonwealth of Massachusetts, have invented certain Improvements in Bufiing Devices, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the grawings indicating like parts in the several 'l liis invention relates to bufiing devices and is shown embodied in a heel scouring wheel.

Rotary bufiing devices are in' common use which are divided longitudinally of their axes into two sections inged together and adapted to hold the two ends of a cover of abrading material between them.

The resent invention is concerned more particu arly with 'the improvement of devices of this class to the end that the cover may be quiclrly applied and, securely held in -work1ng position.

The device herein shown and described comprises means for locking the sections in closed position, constructed to be mechanically brought into operation by the relative alpproachmg movementof the sections 1n 0 osing them upon the ends of the cover. The locking of the sections is thus automatically effected, and the necessity of manually actuating a locking device is avoided. In

the present embodiment of the invention the.

locking means is adapted to retain the sections in different closed positions. This not only permits difierent thicknesses of abrading material to be held in position upon the device, but also allows any looseness in the grip of the sections upon the cover to be taken up, such as may be caused, for example, b the reaction: of the work upon the cover. e arrangement shown is such that within acertam range of relatlve movement of the sections, lying at theaend of. their clos- "ing a movement, the. locking means 1s :auto: ,matically effected to hold the sections from separating from whatever position within said ranget-o which theymayb'e forced. If

desired, the arrangement a may be a suchthat the reaction of the work upon the device will tend to close the sections so thatwany: loose:

I ness the sections upon the abrading material will be automatically taken .up in the use of the device.

Other featnresof the invention, including details of construction; andarrangements of parts, will be hereinafter described and defined in the claims. 1 j r 5 In the drawings, which illustrate a heel scouring wheelconstituting one embodiment of the 1nventi0n;-Figure l is a side elevation of the wheel showing the sections in open position; Fig. 21s a view in side elevation, artly in section, of a portion of the wheel s owing the parts. at an initial stage of the approaching movement of the sec tions; Figs. 3, Land 5 are views similar to Fig. 2, showing successive positions of the parts; Fig. 6 is atransverse sectional view on the line mw. ,of Fig. 1;Fig. 7 is a view in side elevationof the position of the wheel illustrated in Fig. 6; Fig, 8 is a view in perspective of a ortion of: the locking mechanism illustrateg in the preceding views.

Referring to the drawings, the reference numerals 2 and .3 indicate the two sections of aheel scourin wheel which are hinged together at 4 an covered with a leather strip 5 havin a layer of felt 6 secured there to. As is we l-knownl in the use of a device ed, in the; walls- Sand- '9 {imposition to lie above the. arm in the closed position; of the parts is a rotatable; member. 10 which has engagement with r the arm. .7 The member 10 .is provided.- intermediate its ends with" a segmental shaped portion 11.1. t The: portion 11 is so shaped; that; its periphery; s-of a gradually increasing. radius as shown in any one of F1gs.%2 to,- 5, rinclusive and the member 1 10 is so 'mounted thatl: the r rounded 1 ,iace of the 1 portion l;1-: has {contact Wlthrthe; outer face. 12: of theiarmfl whenthej sections are brought together,;-and thus ljocksthe sections in closed position q "It will beapparent from the drawings that by bringing difi'erent points; upon the portion. il'lifint'olcontact with B the arm 7 the "sections may ;.,be--held from separating movement in 'ditterent relative positions. I preferably provide means by which the segment 1-1 is moved automatically. to. hold the sections 2, 3 from separat ng from the an orifice in wall 9, as" shown in Fig. 7.

This spring tends to move the segment 11 into the position shown inFig. "5. The wall 9 may be provided with acavity 16 to receive the spring 13, and-the end portion 15 of the; member 10 may be reduced as shown.

To enable the parts-above described to be mechanically'given' locking position when thesections are moved into "closed position, I arrange said )arts so that the approaching movement of t 18' sections sets and releases thespring-actuated locking member 10. 'For thispurpose the parts may be so arranged that the end Tinthe approaching movement of the sections engages the inner end of segment 11, as's'hown'in Fig. 2," and turns the member 10 about its axis-against the resistance of spring 13 until "thesegment is brought into the position shown in Fig. 3.

In this position 01' segment 11 the arm 7 is treeto pass by the member 10. When said arm is moved by the flat faceof segment 11 the member 10 is releasedand is permitted to be turned by the spring '13 to bring the rounded face of the segment 11 into locking position, as illustrated in Fig. 4Q It will be observed that'the oscillation of the member 10 which takes place in the locking operation, illustrated by the drawings, is eflected mechanically in the closing movement of the" sections, so that all that is required to lockthe sections is" to move them together.

To- )ermit unlocking of the sections 2, 3

I pre erably make the member 10 laterally movable to carry the segment 11 out of engageiiient; with'the arm 7. As shown, I

have provided the "member 10 with a slot or cut-away portion 18, through which the end of the arm 7 may pass when'said arm is disengaged from the segment} 11. The slot 18 is so'formedas to permit the outward movementof the arm 7 at any one of the locking positions which the segment 11 may assume.

The member 10 isnormally held in positionso that'segment 11 isin the path of-thc arm 7 by a metal strip 19 attached at 20 to the wall of the cavity 16 and serving by its "elasticityto holdthe member 10 to the right in Fig. 6. Tli-strip.19 may: be formed if desired to cover the cavity 16, as shown in Ijig. :7. To lim'it the later'al movement of the memberplO in .the-pnlocking operation said member may be provided with a head 21." It will be understood that movement of the member. 10 inthe reverse direction is limited inthe structure shown by the coiled spring 13. I Theavalls 8, 9 are provided with cavities to receive the 'headQl and segment 11, respectively, in the lateral movement of the member 10. Y v

In the useof the polishing or scouring roll shown on the drawings, I prefer to mount the roll so as to be rotated in a lefthanded direction, viewing Fig. 1. With such an arrangement, it will be observed that the action of the abrasive material on the object operated upon will tend to force more closely together the roll sections. The sections being automatically locked from separating movement at all points in the range of relative movement permitted said sections in their closed position, it will be seen that any excessive space between the clamping faces will be automaticallytaken up in the rotation of the roll andwthe grip ofthe roll sections upon the flexible material maintained.

llaving described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. A rotary device for sustaining a cover of abrading material having a plurality of relatively movable cover-supporting sections "arranged to grip between them the two ends of the cover and mechanism for locking said sections in closed position arranged to be mechanically actuated b a the relativemovement of the sections, an constructed to permit the sections to be locked in difi'erent relative positions.

2. A rotary device for sustaining. a cover of abrading material, havingtwo relatively movable sections arranged to receive between them the two ends of the cover and forming in their closed position a cover-supporting surface, mechanism for locking said sections arranged to be brought into operatlon by the relative approaching movement of the 1 sections, and constructed for locking the sections in f different relative positions, and means for actuating said locking mechanism.

3. A rotary device for sustaining a cover of abrading material having a plurality of relativel movable cover-supportlng sections arrange to grip between them the two" ends of the cover, locking mechanism for holding said sections from separating movement constructed to become effective at-any point within a predetermined range of relative movement of the sections, and means for actuating said locking mechanism.

4. A rotary device for sustaining a cover of abrading material having two relatively movable sections arranged to receive between them the two ends of the cover and forming in their closed position a cover-supporting surface, a member rigidly connected to one of said sections, a pivotally supported locking device carried by the other of said sections and arranged to engage said member in its a pivotal movement to lock the sections to gether, sai face having portions at different distances from the arms of said member to permit the locking of the sections in difi'erent relative positions.

6. A rotary device for sustaining a cover of abrading material having two relatively movable sections arran ed to receive between them the two ends of t e cover and forming in their closed position a cover-supporting surface, a member mounted instationary position upon one of said sections, a rotatable'locking device carried by the other of said sections, and arranged to engage said member in its movement to lock the sections together, and means to automatically turn saiddevice into locking position upon the movement of saidsections into closed position.

'7. A rotary'device for sustaining a cover movable sections arranged to receive between them the two ends of the cover and forming in their closed position a cover-supporting surface, a member mounted instationary position upon one of said sections, an oscillatory device carried b the other section and arranged in its osci ation to engage said member to lockthe sections to-- gether, and means'to automatically oscillate said" device in the relative approaching movement of the sections.

'8. A. rotary device for sustaining a cover of abrading material having two relatively movable sections arran ed to receive between them the two en of a cover and forming in their closed position a cover-sup porting surface, an arm carried by one of said sections, a locking member carried by the other section and having means normally in the path of said arm arranged to engage.

A the arm to lock the sections together, sa1d locking member being movable laterall of the sections to move said means out o the path of the arm and permit separation of the sections.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

MILTON H. BALLARD.

Witnesses:

BERNARD Barrows, ELIZABETH O. COUPE.

40 of abrading material having two relatively 

